1 ~ (yourself) (usually disapproving) to spend a lot of time making yourself look attractive and then admiring your appearance:
[VN] Will you stop preening yourself in front of the mirror? [also V]
2 [VN] ~ yourself (on sth) (usually disapproving) to feel very pleased with yourself about sth and show other people how pleased you are
3 [V, VN] ~ (itself) (of a bird) to clean itself or make its feathers smooth with its beak
